What Livestock Might I Add? (a bit long)

Hi all,

My marine tank is finally stable. It's in really great shape. I
guess it is time to throw it out of balance again...lol.

I'm looking to add stock and would appreciate your thoughts on an end
state vision. I think I want a mix of Fish, Inverts and Coral. (in that
order, if compatibility is an issues) Is this doable? Online Fish
Stores write about Fish Only, Reef Tanks and Reef Safe setups. Does
this mean you cannot have it all?

I currently have a Tang, some Damselfish, Coral Banded Shrimp a Fiery
Red Shrimp (it constantly hides), snails and hermit crabs.

My main question: What live stock would be ideal to add over the next
year? I'll add slowly over time so de-stabilization is minimized.

Personally, I like my Tang (Toby), and the pair of Coral Banded Shrimp
(Willie and Wayland). The Damsels were used to cycle...they are OK.
(My fish are named after country singers, but that is another thread
:-)

I'm listing the following creatures so you can better know my taste.
Obviously, many of these don't go together.
Anemone/Clownfish Pair
Long Spine Sea Urchin
Big Colorful Wrasse...Maybe a Moon a Parrot
Sand Sifting Starfish
Blue Spotted Stingray
Brain Coral
Puffer Fish
Lionfish
Gobies
Eels


I posted my setup below to assist with any questions you may have for
me.
--

Marine Setup
Fish: 1ea 5 inch Yellow Tang, 5ea Blue Damselfish (~1 in each)
Inverts: 2ea Coral Banded Shrimp, 1ea Fiery Red Shrimp, 8 Snails, 12
Hermit Crabs...

155 Gallon Rectangular Tank (18 in deep, 72 in wide, 26 in high)
Filters: Eheim Pro II Canister Filter & Dual Bak Pak Protein Skimmer
2ea 200 watt heaters
Compact High Output Florescent Lighting
Established on Aug. 18, 2006

Live Rock: ~10 lbs & a couple of "dead" porous rocks that I hope become
live over time.
2 inches of sugar grain white sand substrate

Current Conditions
Really Great, Crystal Clear Water (finally)
Temp: 78°F, pH: 8.2, Salinity: 1.025
Phosphates, Ammonia, Nitrite and Nitrate are all unmeasurable
8 hrs Natural, Non-Direct, Daylight (8AM-4PM) with 7 Hours of
Florescent Lighting (4-11PM)

Maintenance:
Daily: Feed the Fish, 1 Thimble-Sized Cube of Various Frozen Fish or
Algae
Weekly: Water Tests & Empty/Rinse Protein Skimmer Collectors
Every 3 Weeks: 40 Gallon Water Changes, Scrape Salt Deposits, Rinse
(lightly) the Canister Pads & Gravel in Clean Salt Water & Vacuum sand
if needed.
As Needed: Clean Glass (now, about every 3 days)